Cajun dwarf cray (Cambarellus Shufeltii)

I got two of these at a swap a month ago. They were 1/8" long now about an inch. They eat algae waffers, infact when I enter the room they come right to the glass. I also have seen them munching on snails. Inquisitive and always on the move. I have numerous plants in with them, and they leave them alone. I added a rock pile to the tank which they like to hang in.